/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
See if a class is the one generated by this blueprint
static bool DoesBlueprintDeriveFrom ( const [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) * Blueprint, [UClass](API\Runtime\CoreUObject\UObject\UClass) * TestClass )